On his Substack page, he posted: You may have heard that Humpty Kareem had a great fall.
But I fell and was carted off to UCLA Hospital with a broken hip.
Hard for me to accept that a once world-class athlete just stumbled.

Kareem Abdul-JabbarHarry How/Getty Images
But age is the great equalizer and humbles us all.
The Manhattan Transfer first took the stage in 1969, the same year I first took theNBAcourt.
Who could ask for anything more?

He will have surgery today.
TMZ was the first to report the news.
Since his retirement in 1989, he has become known for his work as an activist and writer.
It was not immediately known the concert Abdul-Jabbar was attending, or the venue where it was held.
Earlier this year, Abdul-Jabbar was in attendance when the Lakers LeBron James surpassed his all-time NBA scoring record.
President Obama awarded Abdul-Jabbar the Presidential Medal of Freedom in 2016.
During his playing days, the UCLA grad gained additional fame in the classic spoof Airplane!
33 Lakers uniform.)